71981695 has 8 divisors (see below), whose sum is σ = 87058944. Its totient is φ = 57131424.

The previous prime is 71981677. The next prime is 71981713. The reversal of 71981695 is 59618917.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71981677) and next prime (71981713).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71981695 - 2¹¹ = 71979647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56044 + ... + 57313.

It is an arithmetic number, because the mean of its divisors is an integer number (10882368).

Almost surely, 2^71981695 is an apocalyptic number.

71981695 is a deficient number, since it is larger than the sum of its proper divisors (15077249).

71981695 is a wasteful number, since it uses less digits than its factorization.

71981695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113489.

The product of its digits is 136080, while the sum is 46.

The square root of 71981695 is about 8484.2026732039. The cubic root of 71981695 is about 415.9815061274.

The spelling of 71981695 in words is "seventy-one million, nine hundred eighty-one thousand, six hundred ninety-five".